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Which among O2+ and O2- is more stable. Explain?

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O2+ is more stable than O2-.Because According to molecular orbital theory O2+ has 15 electrons &it has one electron in antibonding orbital.
molecular orbital diagram of  O2+  

Electronic configuration of O2+

In the case of O2- 17 electrons are present &3 electrons are present in antibonding orbitals. If number of electrons more in antibonding orbital the molecule become unstable.
molecular orbital diagram of O2-

Electronic configuration of O2-

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